Improvement in non-conducting casing for boilers, steam-pipes



, F, Y. ARNOLD. NON-OONDUGTING CASING FOR BOILERS, STEAM PIPES, &e.

Patented Aug. 9, 1870.-

fi'blnitttl swa game one,

Letters Patent N 106,105, dated August 9, 1870.

IMPROVEMENT m NQN-CONDUCTING cesme ron BOILERS, STEAM-PIPES, &c.

The Schedule referred to in these Letters Patent: and naktng part of the same.

To all whom, it may concern.- 7

Be it known that I, FRANCIS Y. ARNOLD, of Philadelphia, in the county of Philadelphia and State-of Pennsylvania, have invented a new and useful Improvement in Non-conducting Casing; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being bad to the accompanying drawing forming part of this specification.

This invention relates to a new and useful improvement in means for preventing loss of heat in steam-pipes, steam-boilers, and furnacesand pipes for heating and conveying air, gases, or water; and

It consists in the construction and arrangement of parts as hereinafter described.

In the drawing- Figure 1 represents an end view of the showing the ribs or stays.

Figure 2 is a'longitudinal section of the same.

Similar letters of reference indicate corresponding parts.

A is the outer casing, which contains the non-conducting material. This casing is made of metal, in two parts, which lap by each other, as seen in the drawing, confined together by the clasp-hooks B.

0 represents longitudinal ribs (more or less in numher) which are connected with the outercasing A by means of the rivets I).-

1') represents half circles of band or hoop-iron, which are also connected with the casing and the ribs by easing,

the rivets D.

The rivets pass through both the ribs and the circlcs, and their ends are riveted oh the outside of the casing, while their heads F project inward, and come in contactwith the pipe or surface to be protected, as

'may be removed at other purposes.

seen in the drawing, where the pipe indicated i| dotted outline.

The heads of the rivets secure an empty space around the pipe or surface to be protected, which space adds materially to the effect of any non-conducting medium, as dead air is known to be one of the best of nou-conductors.

, G represents longitudinal strips of rubber, which are placed within the casing so as to be surroumled by the non-conducting material in the joints, to allow of expansion and'contraction, and secure a tight joint for the confinement of the air. t

' The non-conducting casing-taken as a wholeconstructed in this manner, when applied to steam, writer, or hot-air pipes, may be applied in halves, and pleasure, for making Ppairs or H represent-s pieces of rubber around the rivets, in contact with the outer casing, to allow of the expansion and contraction of the sheet-iron of which it is composed.

Having thus described my invention,

I claim as new and desire to secure by Letters Ifatent- I 1. In combination with a non-conducting casing, the pieces of rubber G and H, to allow for the expansion and contraction of the casing and non-conducting material, substantially as described.

2. The outer casing A, formed in partsconnectcd together by hooks B, the rivets D, provided with beads F on their inner ends, the ribs G, and half circles E E, all arranged as shown and described.

FRANCIS Y. ARNOLD. Witnesses:

J. O. McIsmms, GEO. W. HALL- 

